Studies on Encephalomalacia in the Chick

The Relation Between α-Tocopherol Content of the Breeder Diet and That of the Newly Hatched Chick

“…The amount of total liver tocopherol in chicks declines after hatching and does not begin to increase, even with high amounts of dietary atocopheryl acetate, until 2 weeks later (Irving and Watts, 1962). A relationship between tocopherol levels in the dams' diet and the onset of encephalomalacia in their chicks was shown to exist (Singsen et al, 1954). Differences in AT reserves in newly hatched chicks obtained from different 1 Contribution from The National and University Institute of Agriculture, Rehovot, Israel.…”

Studies on Encephalomalacia in the Chick

“…The breeding stock used to supply the chicks for the experiments reported in this paper was a New Hampshire X Barred Plymouth Rock cross fed the vitamin E-low basal breeding ration described by Singsen et al (1954). This ration was fed for a two-month depletion period before eggs were saved for hatching.…”

“…The blood tocopherol level of chicks hatched from this stock was approximately one third that of day-old chicks hatched from hens fed a normal breeding ration. The vitamin E-low basal ration fed the chicks was described in detail by Singsen et al (1954). This ration contained, by chemical analysis, approximately three International units of vitamin E, from alpha-tocopherol, per pound.…”

“…(Abstract, Poultry Sci. 32: 924, 1953 a low vitamin E reserve (Singsen et al, 1954;Singsen et al, 1955). Dam (1944) has also tested three different fractions of hog liver fatty acids and found that the effectiveness of these acid fractions in producing exudative diathesis and encephalomalacia in chicks reared on a vitamin E deficient diet is related to the iodine values of the acids.…”

Feedstuffs Anaysis, Detection of N,N'-Diphenyl-p-phenylenediamine(DPPD) in Dehydrated Alfalfa and in Mixed Feeds

“…Osborne and Mendel undertook an investigation of the methods of measuring quantitatively the comparative nutritive value of proteins, which they expressed as gains in body weight per gram of protein intake, defined as the protein efficiency ratio. Mitchell has critically reviewed the methods in use for determining the nutritive efficiency of proteins (5).…”